In Birmingham, crews began pre-treating state highway bridges about 9 a.m. Monday, ALDOT spokeswoman Linda Crockett said. Crews are now working on treating the outside lanes.

Gary Smith, district manager for the Blount and St. Clair counties portion of ALDOT's First Division, said state highways in areas that typically have problems during winter weather have been pre-treated with salt brine.

Trucks are working today along U.S. 78 in St. Clair County, Smith said.

Similar operations are under way across central and northern Alabama in five of the department's eight divisions.

Other crews are on standby with trucks loaded with different types materials including sand, salt and CMA, a chemical which helps melt ice, as icy conditions develop, Crockett said.